.main-header .par {
  font-size: 40px;
  text-align: center;
}
.main-header .text {
  color: #666;
}
.main-header {
  width: 80%;
  margin: 60px auto 40px;

}
 .study {
  color: #333;
}
.study-content {
  padding: 0 20px;
}
ul li {
  margin-top: 5px;
  color: #666;
}
ol {
  list-style-type: decimal;
}
.hev{
  font-weight: 700;
}
@media (max-width: 454px) {
  .pt-20{
    padding-top: 20px;
    padding-bottom: 20px;
  }
  .main-header{
    margin: 15px auto 40px;
    width: 90%;
  }
  .pt-5{
    background: #fff;
    padding-top: 5px;
  }
}
.stap p {
  font-size: 20px;
  font-weight: 600;
  
}
.stap li{
  font-size: 20px;
  font-weight: 500;
  margin-bottom: 30px;
}
.main-header .text {
  font-size: large;
}
.jump {
  font-size: 20px;
}